US4647705A - Process for improving the ultraviolet light transmittance of ethylene glycol - Google Patents
Process for improving the ultraviolet light transmittance of ethylene glycol Download PDFInfo
- Publication number
- US4647705A US4647705A US06/765,683 US76568385A US4647705A US 4647705 A US4647705 A US 4647705A US 76568385 A US76568385 A US 76568385A US 4647705 A US4647705 A US 4647705A
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- US
- United States
- Prior art keywords
- ethylene glycol
- aluminum
- percent
- industrial grade
- improving
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C29/00—Preparation of compounds having hydroxy or O-metal groups bound to a carbon atom not belonging to a six-membered aromatic ring
- C07C29/74—Separation; Purification; Use of additives, e.g. for stabilisation
- C07C29/88—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound
- C07C29/90—Separation; Purification; Use of additives, e.g. for stabilisation by treatment giving rise to a chemical modification of at least one compound using hydrogen only
Definitions
- This invention relates to a process for improving the ultraviolet light transmittance of ethylene glycol by treating industrial grade ethylene glycol with an aluminum-nickel alloy.
- ethylene glycol There are many methods known for producing ethylene glycol. A commonly used method involves the hydration of ethylene oxide at increased temperatures under pressure. The resulting ethylene glycol produced by this method and other methods known in the art contains many impurities and can be designated as industrial grade ethylene glycol. It may be used in antifreeze or other products where highest purity is not required.
- the so-called industrial grade ethylene glycol must be distinguished from fiber grade ethylene glycol which is used to make polyesters and other synthetic fibers.
- fiber grade must not contain significant amounts of impurities which will result in the low transmittance of ultraviolet light.
- the ethylene glycol In order to be acceptable as fiber grade ethylene glycol, the ethylene glycol generally must have an ultraviolet transmittance of at least 70 percent at 220 nanometers, at least 90 percent at 275 nanometers, and at least 95 percent at 350 nanometers.
- the subject invention relates to a process for improving the ultraviolet transmittance of ethylene glycol which comprises treating industrial grade ethylene glycol with an aluminum-nickel alloy.
- An ultraviolet light transmittance of at least 70 percent at 220 nanometers, at least 90 percent at 275 nanometers, and at least 95 percent at 350 nanometers can be achieved by this process.
- the resulting ethylene glycol can be used as or for the preparation of fiber grade ethylene glycol.
- ethylene glycol will be defined as any ethylene glycol product (it may contain some diethylene glycol, triethylene glycol, ethanol, and the like in addition to other impurities) having an ultraviolet transmittance of less than 70 percent at 220 nanometers, less than 90 percent at 275 nanometers, and less than 95 percent at 350 nanometers.
- the industrial grade ethylene glycol is treated with an aluminum-nickel alloy and an alkali compound by adding them to the industrial grade ethylene glycol.
- the object is to expose all of the industrial grade ethylene glycol to the surface of the aluminum-nickel alloy in a basic environment. In view of this objective, it is preferred to agitate the mixture of industrial grade ethylene glycol and aluminum-nickel alloy. It may also be useful to carry out the treatment at increased terperatures and pressures. Any procedure which provides maximum exposure of the industrial grade ethylene glycol to the catalyst surface is desirable.
- Primary or unactivated aluminum-nickel alloys are used in the subject process. These alloys are well known in the art and are precursors used for the preparation of Raney nickel catalysts.
- the weight ratio of aluminum to nickel is from about 4:1 to about 1:2.
- the alloys are usually prepared by melting the aluminum and heating to increased temperatures such as 1200° C.
- the nickel is then added, preferably in the form of small cubes.
- the nickel then dissolves and an exothermic reaction occurs. After cooling, the alloy is broken by hammering and then pulverized.
- the treatment process takes place in the presence of the pulverized aluminum-nickel alloy and an alkali compound such as sodium hydroxide, potassium hydroxide, calcium hydroxide, sodium carbonate, and the like, preferably in stoichiometric amounts based upon the aluminum.
- the alkali compound is added as an aqueous alkali solution. Generally a 5 percent to 40 percent aqueous alkali solution is sufficient. Sufficient alloy and alkali are added to the industrial grade ethylene glycol to meet the desired transmittance requirements. The amount will depend upon the concentration of the adsorbing impurities.
- a hydrogenation apparatus was prepared consisting of a hydrogenation vessel, an addition funnel connected to the vessel for adding an alkali solution, and a mercury reservoir connected to the hydrogenation vessel by tubing.
- the treated industrial grade ethylene glycol met the ultraviolet adsorption specification for fiber grade ethylene glycol.
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- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims (4)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/765,683 US4647705A (en) | 1985-08-15 | 1985-08-15 | Process for improving the ultraviolet light transmittance of ethylene glycol |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US06/765,683 US4647705A (en) | 1985-08-15 | 1985-08-15 | Process for improving the ultraviolet light transmittance of ethylene glycol |
Publications (1)
Publication Number | Publication Date |
---|---|
US4647705A true US4647705A (en) | 1987-03-03 |
Family
ID=25074219
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US06/765,683 Expired - Fee Related US4647705A (en) | 1985-08-15 | 1985-08-15 | Process for improving the ultraviolet light transmittance of ethylene glycol |
Country Status (1)
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US (1) | US4647705A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4830712A (en) * | 1987-09-29 | 1989-05-16 | Union Carbide Corporation | Process for refining ethylene glycol |
US6437199B1 (en) * | 1999-07-14 | 2002-08-20 | Nippon Shokubai Co., Ltd. | Method for production of high-purity monoethylene glycol |
US20100121113A1 (en) * | 2008-11-10 | 2010-05-13 | The Dow Chemical Company | Process for producing low color glycols |
CN101199934B (en) * | 2006-12-13 | 2010-09-22 | 中国石油化工股份有限公司 | Process for preparing modified amorphous nickel alloy catalyst |
CN101928201A (en) * | 2009-06-26 | 2010-12-29 | 上海焦化有限公司 | Purification technique for coal glycol rude products |
CN104098439A (en) * | 2013-04-11 | 2014-10-15 | 中国科学院大连化学物理研究所 | Biomass glycol refining method |
CN107285997A (en) * | 2016-03-30 | 2017-10-24 | 长春美禾科技发展有限公司 | It is a kind of to improve the method for ethylene glycol ultraviolet permeability |
Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2768214A (en) * | 1952-01-17 | 1956-10-23 | Gen Aniline & Film Corp | Elimination of color-forming impurities from 1, 4-butanediol |
GB981965A (en) * | 1961-03-20 | 1965-02-03 | Gulf Research Development Co | Process for producing oxo alcohol having a low aldehyde content |
US3970711A (en) * | 1971-07-19 | 1976-07-20 | Ppg Industries, Inc. | Method of producing glycols |
US4118582A (en) * | 1975-10-28 | 1978-10-03 | E. I. Du Pont De Nemours And Company | Purification of spent ethylene glycol |
US4154970A (en) * | 1977-06-24 | 1979-05-15 | Basf Aktiengesellschaft | Treatment of butanediol obtained as a condensate during the manufacture of polybutylene terephthalate |
DE2831210A1 (en) * | 1978-07-15 | 1980-01-24 | Huels Chemische Werke Ag | METHOD FOR PURIFYING ETHYLDIGLYCOL AND DIPROPYLENE GLYCOL |
US4213000A (en) * | 1979-05-29 | 1980-07-15 | E. I. Du Pont De Nemours And Company | Reducing color formers in 1,4-butanediol |
US4349417A (en) * | 1980-01-18 | 1982-09-14 | Hoechst Aktiengesellschaft | Process for the manufacture of extremely pure monoethylene glycol |
-
1985
- 1985-08-15 US US06/765,683 patent/US4647705A/en not_active Expired - Fee Related
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2768214A (en) * | 1952-01-17 | 1956-10-23 | Gen Aniline & Film Corp | Elimination of color-forming impurities from 1, 4-butanediol |
GB981965A (en) * | 1961-03-20 | 1965-02-03 | Gulf Research Development Co | Process for producing oxo alcohol having a low aldehyde content |
US3970711A (en) * | 1971-07-19 | 1976-07-20 | Ppg Industries, Inc. | Method of producing glycols |
US4118582A (en) * | 1975-10-28 | 1978-10-03 | E. I. Du Pont De Nemours And Company | Purification of spent ethylene glycol |
US4154970A (en) * | 1977-06-24 | 1979-05-15 | Basf Aktiengesellschaft | Treatment of butanediol obtained as a condensate during the manufacture of polybutylene terephthalate |
DE2831210A1 (en) * | 1978-07-15 | 1980-01-24 | Huels Chemische Werke Ag | METHOD FOR PURIFYING ETHYLDIGLYCOL AND DIPROPYLENE GLYCOL |
US4213000A (en) * | 1979-05-29 | 1980-07-15 | E. I. Du Pont De Nemours And Company | Reducing color formers in 1,4-butanediol |
US4349417A (en) * | 1980-01-18 | 1982-09-14 | Hoechst Aktiengesellschaft | Process for the manufacture of extremely pure monoethylene glycol |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4830712A (en) * | 1987-09-29 | 1989-05-16 | Union Carbide Corporation | Process for refining ethylene glycol |
US6437199B1 (en) * | 1999-07-14 | 2002-08-20 | Nippon Shokubai Co., Ltd. | Method for production of high-purity monoethylene glycol |
CN101199934B (en) * | 2006-12-13 | 2010-09-22 | 中国石油化工股份有限公司 | Process for preparing modified amorphous nickel alloy catalyst |
US20100121113A1 (en) * | 2008-11-10 | 2010-05-13 | The Dow Chemical Company | Process for producing low color glycols |
US8293949B2 (en) | 2008-11-10 | 2012-10-23 | Dow Technology Investments Llc | Process for producing low color glycols |
CN101928201A (en) * | 2009-06-26 | 2010-12-29 | 上海焦化有限公司 | Purification technique for coal glycol rude products |
CN101928201B (en) * | 2009-06-26 | 2013-04-10 | 上海焦化有限公司 | Purification technique for coal glycol rude products |
CN104098439A (en) * | 2013-04-11 | 2014-10-15 | 中国科学院大连化学物理研究所 | Biomass glycol refining method |
CN107285997A (en) * | 2016-03-30 | 2017-10-24 | 长春美禾科技发展有限公司 | It is a kind of to improve the method for ethylene glycol ultraviolet permeability |
CN107285997B (en) * | 2016-03-30 | 2022-04-22 | 长春美禾科技发展有限公司 | Method for improving ultraviolet transmittance of ethylene glycol |
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Owner name: BASF CORPORATION, 1419 BIDDLE AVENUE, WYANDOTTE, M Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNORS:SCHMITT, THOMAS M.;ALLEN, GEROGE M.;DAVIS, PAULS;REEL/FRAME:004606/0824;SIGNING DATES FROM 19860528 TO 19860529 |
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Effective date: 19990303 |
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STCH | Information on status: patent discontinuation |
Free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |